This example demonstrates how to combine data from multiple asynchronous fetches in D3.js. It first loads an overview of Dutch parking facilities using `d3.json` with a CORS proxy, then filters locations by name. It concurrently fetches two specific parking location datasets and uses `Promise.all` to wait for both before processing the results. The code logs the combined response arrays without rendering any visualization, focusing purely on the data-fetching and merging workflow.